Grinding-mill



(No Model.)

L. 1'). HARRISON.

GRINDING MILL.

No. 357,925. Patented Feb. 15, 1887.

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N. PETERS. Phulo-Lillwgmpher. Wallinglon D. I;

NITE STATES PATE T OFFICE.

LEONARD D. HARRISON, OF NEW HAVEN, CONNECTICUT.

CGRINDING-VMILL.

HPECIPICATION forming part of Letters Patent No. 357,925, dated February 15, 1887.

Application filed March 29, 1886. Serial No. 196,930.

To aZZ whom it may concern:

I Be it known that I, LEONARD D. HARRISON, of New Haven, in the county of New Haven and State of Connecticut, have invented a new ImprovementinGrinding-Mills; andI do hereby deelare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure 1, a side view of the mill complete; Fig. 2, a longitudinal section through the part B of the case, feedspout, shoe, and hopper; Fig. 3, a transverse section through the part B of the case, hopper, and feed-spout; and Fig. 4, an end View showing the cam or eccentric on the spindle to impart vibratory movement to the shoe.

This invention relates to an improvement in the grinding-mill well known in the trade as the Harrison Mill, and is an improvement upon the mills for which Letters Patent of the United States Nos. 81,780, 122,827,-and193,653 were granted to Edward Harrison. In this class of mills the axis of the stones is horizontal-- that is, the runnerstone revolves in a vertical planethe two stones being inclosed within a case or shell, the object being to simplify the fitting of the hopper to the mill and to facilitate the feed of the mill.

The case or shell is made in two parts, A B, bolted together, the division being in a vertical plane.

C represents the spindle arranged in suitable bearings in the case and carrying the runner-stone, the spindle being driven by power applied to a pulley, D, thereon.

E represents the bed-stone, and F the discharge-spout, all of substantially the same construction and arrangement as in the patents before referred to, and do not require detailed description or illustration, as such construction constitutes no part of my invention.

G is the feed-spout, which is upon the end of the case outside the bedstone, and from the bottom of which is an aperture, H,whieh leads into the opening through the bed-stone, as in the patents before referred to.

The spindle 0 extends through the mill and out beneath the feed-spout, and upon its outer (No model.)

end is an eccentric or cam, l, fixed thereto, so as to revolv'e with the spindle.

Upon the top of the part B of the ease upwardly-projecting flanges L L are formed, the two flanges connected by a similar flange, M, at the inner ends, as seen in Fig. 2. The upper edges of these flanges are turned inward, as at a, so as to form a seat for the hopper N. The hopper is constructed with a flange, b, around its mouth to set upon the upper edges of the flangesL L and M, and so as to be bolted thereto, as seen in Fig. 3.

The flanges L L and M form a chamber, 0, directly beneath the mouth of the hopper,and in this chamber the shoe]? is arranged. This shoe is somewhat narrower than the chamber, so as to be permitted free play therein transversely, the mouth of the hopper entering the shoe, as seen in Figs. 2 and 3. The shoe extends outward over the feed-spout, and is constructed with an opening, B, leading into said feedspout, as seen in"Fig. 2, projecting from the outer end of the shoe, and formed as an integral part thereof is a lever, S, extending downward toward the spindle outside the feed-spout. The lever is hung to the feedspout upon a fulcrum, T, between the spout and the spindle. The lower arm of the lever S is forked, so as to embrace the eccentric or cam I on the shaft, as seen in Figs. 2 and 4,a11d so that as the shaft revolves it will impart a transverse shaking or vibratory movement to the shoe sufficient to cause the grain coming from the hopper onto the shoe to work down the inclined bottom of the shoe and thence into the feed-spout. By this construction the feed spout, hopper, and shoe are fixed to one and the same part of the case, so that in separating the ease,,as for repairs of the stones, no detachment of these parts is required, and the shoe and hopper are brought into the most compact and convenient form.

The shoe is inclosed in a chamber, thus avoiding the exposure over the whole top of the case, as in the previous construction, and the attachment of the hopper is one which permits its easy removal and adjustment when required.

The hopper is provided with the usual adj ustinggate, U.

I claim In a grindingmill, the case formed in two chamber '0, the shoe P, within said chamber parts, A B, the division being vertical, the said in combination with the spindle 0, having an part B having a feed-spout, G, the fulcrum T, eccentric or cam for imparting vibratory move- 10 and the hopper-seat L L, formed integrally ment to said lever and shoe, substantially as therewith, the chamber 0, the hopper N, sedescribed.

cured to said seat L L and covering the said LEONARD D. HARRISON.

Vitnesses:

JOHN E. EARLE, FRED (J, EARLE.

and extending over the feed-spout, and the le- Ver S, formed integrally with said feed-spout, 

